Is it creepy for a 30 year old to go out with a 33 year old?
No?
Hm then why on earth would this be weird?

Seriously dude, ignore the hypocrisy, unless she is really immature and childish you should have no problems. At this age people are finding themselves, starting to become mature; the right sort of people anyway. and if she's the right sort of person - go for it. **** judgers.